The 
Hoover Agitator Belt, with the Hoover Part # 044783AG, is the correct belt for the Hoover U7045 Lightweight Commercial Vacuum. The Hoover Agitator Belt, with the Hoover Part # 044783AG, will also fit the Hoover commercial Industrial and Guardsman upright vacuum cleaners. The Hoover Agitator Belt, with the Hoover Part # 044783AG, can also be found listed under the Hoover part number 40201062. 

Here is a link to our GoVacuum.com website so you can view and purchase the 
Hoover Agitator Belt, with the Hoover Part # 044783AG: http://www.govacuum.com/hoover-style-ag-guardsman-belt-1-pack-part-044783ag.html